Modems; modems used in connection with the transfer of voice and data over electrical power lines; power supplies for modems; voltage regulators; [ apparatus and devices for recording, transmission or reproduction of sound or images; ] computer hardware and software for enabling voice and data communication over electrical power lines; computer hardware and software for enabling broadband capacity voice and data communication over electrical power lines; sensing and signaling devices for the measurement and control of electricity, namely, electric meters; apparatus and devices for power line communication systems, namely, low and medium voltage inductive and capacitive electric connectors for use with electrical power lines; automated meter reading systems, namely, automatic electronic systems for reading and controlling electric, gas and water utility meters; automatic electronic systems for remote monitoring and control of electric, gas and water utility meters, namely, spectrum analyzers and oscilloscopes, impedance measurement tools, frequency analyzers, AD converters, narrowband generators and broadband generators; power line communication test and analysis systems comprised of computer hardware, software, electronic sensors and digital displays for monitoring and analyzing the transmission of voice and data over electrical power lines; software for the control of power line communication systems